The former Secret Circle witch has joined The Vampire Diaries for Season 4 — where she very well might come between a fan favorite couple, TVGuide.com reports.

Tonkin — who starred with Claire Holt (aka TVD‘s Rebekah) on the Aussie show H2O: Just Add Water — will play Tyler’s friend Hayley, who is described as wild, sexy and free-spirited.

“We’ll start to understand that this is a friend … who’s been very important to him in the past,” executive producer Julie Plec previously teased to TVLine. As for whether Caroline and Tyler fans should be worried, Plec replied, “Any time a hot, new girl comes to town, somebody’s got to be worried about something.”

Tonkin will first appear in Episode 3 of the CW drama’s new season, which premieres Thursday, Oct. 11 at 8/7c.

• If you missed the extended preview of NBC’s new J.J. Abrams/Eric Kripke drama Revolution (premiering Sept. 17 at 10/9c) — first shown during Monday night’s Olympics coverage — we’ve got it right here for you:

• The newest Homeland Season 2 trailer poses a very important and foreboding question: “If everything you had was taken away and you had nothing left to lose, what lengths would you go to for the one idea that pulled you through?” The Showtime series returns Sept. 30th at 10/9c.

• Fox is developing an adaptation of the 1996 Alex Garland novel The Beach to be written by Andrew Miller (The Secret Circle), per Deadline. The book was previously made into a movie starring Leonardo DiCaprio and directed by Danny Boyle.

• The Paley Center for Media’s prop-tastic Television: Out of the Box exhibit in Los Angeles is growing. Family Matters alum Darius McCrary (a.k.a. Eddie Winslow) recently donated some of his signature duds from the show. The presentation — featuring costumes, animation art, patent filings from nearly 60 years of iconic Warner Bros. programming — will run for the next three years.